April 6 project update: Disassembly continues

Posted on Apr 6 2015 8:58 AM
It’s been a busy week since Seattle Tunnel Partners lifted the SR 99 tunneling machine’s front end to the surface for repairs. Crews spent the first few days after the lift cleaning and disconnecting parts. Then, on Friday afternoon, they removed the machine’s bearing block and set it on a platform south of the cutterhead.
 
Further disassembly will continue in the coming days, including removal of the main bearing. When the disassembly phase of STP’s repair effort is complete, manufacturer Hitachi Zosen will begin making repairs and enhancements (links to YouTube). You can continue to track STP’s work on our time-lapse cameras and follow @BerthaDigsSR99 on Twitter for updates. Don't forget to check out the other resources we've created to give you a fuller understanding of Bertha's story: